physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
One of the most common reasons to get a painful sore on the roof of your mouth is because of eating hot food. The skin on the hard palate is much more delicate than your tongue, and burns can cause blisters, swelling, and damage to the roof of the mouth.